Advertisements
Advertisements
प्रश्न
A model of a ship is made to a scale 1 : 300.
- The length of the model of the ship is 2 m. Calculate the length of the ship.
- The area of the deck of the ship is 180,000 m2. Calculate the area of the deck of the model.
- The volume of the model is 6.5 m3. Calculate the volume of the ship.
उत्तर
i. Scale factor k = `1/300`
Length of the model of the ship = k × Length of the ship
`=> 2 = 1/300 xx "Length of the ship"`
`=>` Length of the ship = 600 m
ii. Area of the deck of the model = k2 × Area of the deck of the ship
`=>` Area of the deck of the model = `(1/300)^2 xx 180,000`
= `1/90000 xx 180,000`
= 2 m2
(iii) Volume of the model = k3 × Volume of the ship
`=> 6.5 = (1/300)^3 xx "Volume of the ship"`
`=>` Volume of the ship = 6.5 × 27000000 = 175500000 m3
APPEARS IN
संबंधित प्रश्न
In figure, find ∠L
In figure, ABCD is a trapezium with AB || DC. If ∆AED is similar to ∆BEC, prove that AD = BC.
In a circle, two chords AB and CD intersect at a point P inside the circle. Prove that
(a) ΔPAC ∼PDB (b) PA. PB= PC.PD
ΔABC ~ ΔDEF and their areas are respectively `100cm^2` and `49cm2`. If the altitude of ΔABC is 5cm, find the corresponding altitude of ΔDEF.
In the given figure, ABC is a triangle and PQ is a straight line meeting AB in P and AC in Q. If AP = 1cm, PB = 3cm, AQ = 1.5cm, QC = 4.5cm, prove that area of ΔAPQ is 116 of the area of ΔABC.
Are the triangles in the given figure similar? If yes, by which test?
In the figure, parts of the two triangles bearing identical marks are
congruent. State the test by which the triangles are congruent.
D and E are points on the sides AB and AC of ΔABC such that DE | | BC and divides ΔABC into two parts, equal in area. Find `"BD"/"AB"`.
In the adjacent figure, ∆ABC is right angled at C and DE ⊥ AB. Prove that ∆ABC ~ ∆ADE and hence find the lengths of AE and DE
In the figure, which of the following statements is true?